Scanning the past

Article Abstract:

In Sep 1932, a paper written by Arthur F. Van Dyck and published in the Proceedings of the Institute of Radio Engineers (IRE) discussed the use of dynamic symmetry in radio design. The paper characterized dynamic symmetry as being the 'science of vital relations to areas.' Van Dyck also stated that dynamic symmetry has a strong fascination for engineers because it serves as a connecting link between art and engineering. The paper went on to distinguish between methods employing the convergent principle, where a designer begins with the whole object and works inward to determine the optimum size and location of internal parts, and the divergent principle, where a designer works from the inside out. Van Dyck was IRE president in 1942. His principle theme was the need for engineers to become more socially responsible.

Engineering, Biographies, Computer history, Biography, Achievements and Awards, History of Computing, Proceedings of the Institute of Radio Engineers, Van Dyck, Arthur F.

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Scanning the issue

Article Abstract:

Wave propagation theory in electromagnetics serves as the theme for 22 articles by IEEE contributors. A quasiparticle approach to wave propagation is examined through the links between wave propagation and quantum mechanics. Random media is dealt with in an historical perspective and by viewing diverse media configurations with backscattering enhancement phenomena present. Electromagnetic energy transportation is explored in space-time solutions and classical pulse propagation methods. Ray parameterization, Gaussian beam representations, and surface impedance each have methods proposed. A formulation unifies finite element and integral equation methods and applications are presented. Several other aspects of electromagnetics, including antennas, microwaves and polarimetric radar are addressed.

Mathematical models, Microwaves, Electromagnetic radiation, Wave propagation, Parameters, Transmission Lines, Transient State, Boundary-Value Problems

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